Anti-loosening combined screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-loosening combined screw which comprises a screw head and a screw rod concentric with the screw head, an elastic pad is sleeved on the screw rod, a stop block with a square section is connected between the screw head and one end of the screw rod, and the stop block is connected with the screw head. The size of the outer circle of the screw head is larger than the size of the side edge of the stop block, the screw further comprises a supporting plate, a rectangular hole matched with the stop block is formed in the supporting plate, the two ends of the supporting plate are connected with a first inclined plate and a second inclined plate respectively, the side edge of the first inclined plate is connected with a left horizontal plate, a limiting rod is arranged on the left horizontal plate in a penetrating mode, and the left horizontal plate is connected with a right horizontal plate. The upper end of the limiting rod extends to the position above the left horizontal plate, the side edge of the second inclined plate is connected with a right horizontal plate, and the side edge, away from the second inclined plate, of the right horizontal plate is connected with a push-pull plate. The difference value between the length of the inner wall of the rectangular hole and the length of the stop block is larger than the diameter of the limiting rod. The anti-loosening device is reasonable in structure and solves the problem that the anti-loosening effect is poor.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a combination screw for preventing loosening. Background Technology

[0002] A screw is a common standard connecting component, typically consisting of a head and a shank with external threads. It is tightened into the threaded hole of the parts being connected, utilizing the friction and mechanical engagement of the threads to secure two or more parts. Generally, it does not require the use of a nut. In numerous fields such as machinery manufacturing, electronic equipment, furniture, and building decoration, screws are essential components for connecting and fixing parts, offering advantages such as strong connections, convenient installation, and easy disassembly.

[0003] Regarding the aforementioned technologies, the inventors discovered that when screws are used on mechanical equipment, the screws at the connection points of key components of the mechanical equipment need to have a strong anti-loosening effect. However, existing screws generally use spring washers and flat washers to prevent loosening. Since the mechanical equipment is in a state of vibration for a long time, the screws will still loosen to a certain extent, which has a certain impact on the connection effect and safety of key components in the mechanical equipment. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a combination screw that prevents loosening, thus solving the problem of poor anti-loosening effect.

[0005] To solve the above-mentioned technical problems, the present invention provides a combination screw for preventing loosening, comprising: a screw head and a screw rod concentrically arranged therewith, a spring washer sleeved on the screw rod, a stop block with a square cross-section connected between the screw head and one end of the screw rod, the outer diameter of the screw head being larger than the side diameter of the stop block, and a support plate, the support plate having a rectangular hole adapted to the stop block, the two ends of the support plate being respectively connected to an inclined plate one and an inclined plate two, the side of the inclined plate one being connected to a left horizontal plate, a limiting rod passing through the left horizontal plate, the upper end of the limiting rod extending above the left horizontal plate, the side of the inclined plate two being connected to a right horizontal plate, and a push-pull plate being connected to the side of the right horizontal plate away from the inclined plate two;

[0006] The difference between the length of the inner wall of the rectangular hole and the length of the stop block is greater than the diameter of the limiting rod;

[0007] The support plate, inclined plate one, inclined plate two, left horizontal plate, right horizontal plate and push-pull plate are made of elastic plate in one piece.

[0008] By adopting the above technical solution, during use, the combination screw is screwed into the threaded hole on the mechanical equipment component. An Allen wrench is inserted into the hexagonal hole on the screw head, and the Allen wrench is rotated to tightly connect the combination screw to the mechanical equipment component. During the rotation of the screw, the support plate also rotates with the stop block. After the combination screw fixes the mechanical equipment component, a limiting hole is made on the surface of the component using a hand-held electric drill. Since the rectangular hole on the support plate fits onto the stop block, and the difference between the length of the inner wall of the rectangular hole and the length of the stop block is greater than the diameter of the limiting rod, the push-pull plate is moved by hand. The push-pull plate, through the right horizontal plate, the second inclined plate, the support plate, the first inclined plate, and the left horizontal plate, drives the limiting rod to move into the matching limiting hole, thereby preventing the screw from rotating in the opposite direction, achieving the purpose of preventing loosening, and enhancing the use effect.

[0009] In a preferred embodiment, the present invention can be further configured such that a pull ring is connected to the upper end of the limiting rod.

[0010] By adopting the above technical solution, during the disassembly of the combination screw, the use of the pull ring facilitates manual operation by pulling the limit rod upward to disengage it from the limit hole, and then pulling the push-pull plate to drive the limit rod to misalign with the limit hole. The combination screw can then be disassembled using a hex wrench, which improves the convenience of operation.

[0011] In a preferred embodiment, the present invention can be further configured such that a plurality of hemispherical protrusions are spaced apart on the lower surface of the right horizontal plate.

[0012] By adopting the above technical solution and using the hemispherical boss, the friction between the right horizontal plate and the surface of the component is reduced.

[0013] In a preferred embodiment, the present invention can be further configured such that the sum of the thicknesses of the stop block and the spring pad is equal to the distance between the upper plane of the support plate and the lower plane of the left horizontal plate.

[0014] By adopting the above technical solution, both the left and right horizontal plates are in contact with the components.

[0015] In a preferred embodiment, the present invention can be further configured such that the lower end of the limiting rod is rounded.

[0016] By adopting the above technical solution, the lower end of the limiting rod is rounded, which facilitates the guiding of the limiting rod into the limiting hole and improves the convenience of operation.

[0017] In a preferred embodiment, the present invention can be further configured such that the thickness of the support plate is 0.8 to 1.2 mm.

[0018] By adopting the above technical solution, since the thickness of the support plate is 0.8 to 1.2 mm, that is, the thickness of the first inclined plate, the second inclined plate, the left horizontal plate, the right horizontal plate and the push-pull plate are all 0.8 to 1.2 mm, the support plate, the first inclined plate, the second inclined plate, the left horizontal plate, the right horizontal plate and the push-pull plate can produce a small amount of elastic deformation.

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] After the combination screws fix the parts on the mechanical equipment, a limiting hole is made on the surface of the parts using a hand-held electric drill. Since the rectangular hole on the support plate is fitted onto the stop block, and the difference between the length of the inner wall of the rectangular hole and the length of the stop block is greater than the diameter of the limiting rod, the limiting rod is moved into the matching limiting hole by pushing the push-pull plate by hand, thereby preventing the screw from rotating in the opposite direction, achieving the purpose of preventing loosening and enhancing the use effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of a combination screw for preventing loosening according to the present invention.

[0023] Figure 2 This is another structural schematic diagram of the present invention.

[0024] In the diagram: 1. Screw head; 2. Screw; 3. Spring washer; 4. Stop block; 5. Support plate; 6. Rectangular hole; 7. Inclined plate one; 8. Inclined plate two; 9. Left horizontal plate; 11. Limiting rod; 12. Right horizontal plate; 13. Push-pull plate; 14. Pull ring; 15. Hemispherical boss. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] Reference Figures 1-2This utility model discloses a modular anti-loosening screw, comprising: a screw head 1 and a screw rod 2 concentrically arranged therewith; a spring washer 3 is fitted on the screw rod 2; a stop block 4 with a square cross-section is connected between the screw head 1 and one end of the screw rod 2; the outer diameter of the screw head 1 is larger than the side diameter of the stop block 4; a support plate 5 is also included, with a rectangular hole 6 on the support plate 5 that matches the stop block 4; an inclined plate 7 and an inclined plate 8 are respectively connected to both ends of the support plate 5; a left horizontal plate 9 is connected to the side of the inclined plate 7; a limiting rod 11 passes through the left horizontal plate 9; the upper end of the limiting rod 11 extends... Above the left horizontal plate 9, the side of the inclined plate 2 8 is connected to the right horizontal plate 12, and the side of the right horizontal plate 12 away from the inclined plate 2 8 is connected to the push-pull plate 13; the difference between the length of the inner wall of the rectangular hole 6 and the length of the stop block 4 is greater than the diameter of the limit rod 11; the support plate 5, the inclined plate 1 7, the inclined plate 2 8, the left horizontal plate 9, the right horizontal plate 12 and the push-pull plate 13 are made of elastic plates in one piece, and the thickness of the support plate 5 is 0.8 to 1.2 mm, that is, the thickness of the support plate 5, the inclined plate 1 7, the inclined plate 2 8, the left horizontal plate 9, the right horizontal plate 12 and the push-pull plate 13 are all 0.8 to 1.2 mm.

[0028] The upper end of the limiting rod 11 is connected to a pull ring 14; during the disassembly of the combination screw, the pull ring 14 facilitates manual operation to pull the limiting rod 11 upwards away from the limiting hole, and then pull the push-pull plate 13 to drive the limiting rod 11 to be misaligned with the limiting hole, and use a hex wrench to disassemble the combination screw, which improves the convenience of operation.

[0029] The lower surface of the right horizontal plate 12 is connected with several hemispherical bosses 15 at intervals; the use of hemispherical bosses 15 reduces the friction between the right horizontal plate 12 and the surface of the component.

[0030] The sum of the thicknesses of the stop block 4 and the spring pad 3 is equal to the distance between the upper plane of the support plate 5 and the lower plane of the left horizontal plate 9, so that both the left horizontal plate 9 and the right horizontal plate 12 are in contact with the components.

[0031] The lower end of the limiting rod 11 is rounded; by rounding the lower end of the limiting rod 11, it is easier to guide the limiting rod 11 into the limiting hole, thus improving the convenience of operation.

[0032] The implementation principle of this embodiment is as follows: During use, the combination screw is screwed into the threaded hole on the mechanical equipment component. An Allen wrench is inserted into the hexagonal hole of the screw head 1, and the Allen wrench is rotated to tightly connect the combination screw to the mechanical equipment component. During the rotation of the screw 2, the support plate 5 also rotates with the stop block 4. After the combination screw fixes the mechanical equipment component, a limiting hole is made on the surface of the component using a hand-held electric drill. Since the rectangular hole 6 on the support plate 5 is fitted onto the stop block 4, and the difference between the length of the inner wall of the rectangular hole 6 and the length of the stop block 4 is greater than the diameter of the limiting rod 11, the push-pull plate 13 is moved by hand. The push-pull plate 13 drives the limiting rod 11 to move into the matching limiting hole through the right horizontal plate 12, the second inclined plate 8, the support plate 5, the first inclined plate 7, and the left horizontal plate 9, thereby preventing the screw 2 from rotating in the opposite direction, achieving the purpose of preventing loosening and enhancing the use effect.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A combination screw for preventing loosening, comprising: The screw head (1) and a screw rod (2) concentrically arranged therewith, wherein a spring washer (3) is fitted on the screw rod (2), characterized in that a stop block (4) with a square cross-section is connected between one end of the screw head (1) and the screw rod (2), wherein the outer diameter of the screw head (1) is larger than the side diameter of the stop block (4), and a support plate (5) is also included, wherein the support plate (5) is provided with a rectangular hole (6) adapted to the stop block (4), wherein the support plate (5) 5) is connected to two inclined plates 1 (7) and 2 (8) respectively. The side of the inclined plate 1 (7) is connected to a left horizontal plate (9). A limiting rod (11) is passed through the left horizontal plate (9). The upper end of the limiting rod (11) extends to the top of the left horizontal plate (9). The side of the inclined plate 2 (8) is connected to a right horizontal plate (12). The side of the right horizontal plate (12) away from the inclined plate 2 (8) is connected to a push-pull plate (13). The difference between the length of the inner wall of the rectangular hole (6) and the length of the stop block (4) is greater than the diameter of the limiting rod (11); The support plate (5), inclined plate one (7), inclined plate two (8), left horizontal plate (9), right horizontal plate (12) and push-pull plate (13) are made of elastic plate in one piece.

2. The anti-loosening combination screw according to claim 1, characterized in that, The upper end of the limiting rod (11) is connected to a pull ring (14).

3. The anti-loosening combination screw according to claim 1, characterized in that, The lower surface of the right horizontal plate (12) is connected with a number of hemispherical protrusions (15) at intervals.

4. The anti-loosening combination screw according to claim 1, characterized in that, The sum of the thicknesses of the stop block (4) and the spring pad (3) is equal to the distance between the upper plane of the support plate (5) and the lower plane of the left horizontal plate (9).

5. The anti-loosening combination screw according to claim 1, characterized in that, The lower end of the limiting rod (11) is rounded.

6. The anti-loosening combination screw according to claim 1, characterized in that, The thickness of the support plate (5) is 0.8 to 1.2 mm.

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